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Denomination: 'Poulcs017'
Trade name: Blois
Botanical Name: Rosa
Applicant/Holder: Poulsen Roser A/S
Kratbjerg 332
Breeder: Mogens N. Olesen, Poulsen Roser A/S, Fredensborg, Denmark
Agent in Canada: Miller Thomson Pouliot LLP
1000 De La Gauchetière Street West, Suite 3700
Montréal, Quebec
H3B 4W5
Tel: 514-871-5449
Application Date: 2005-08-25
Application Number: 05-5041
Grant of Rights Date: 2008-12-30
Certificate Number: 3433
Exemption from compulsory licensing: Yes
Expiry date for exemption from compulsory licensing: 2010-12-30
Date rights surrendered: 2010-11-29

Variety Description

Varieties used for comparison: 'Poulcs004' (Ledreborg) and 'Poulcs014' (Limoges)

Summary: 'Poulcs017' has a lower number of flowers per flowering shoot while 'Poulcs014' has a medium number. 'Poulcs017' has a double flower type while the reference varieties have very full flower types. 'Poulcs017' has a larger flower diameter than 'Poulcs014'. 'Poulcs017' has a whiter overall flower colour than 'Poulcs014'. 'Poulcs017' has a longer petal than the reference varieties and a wider petal than 'Poulcs014'.


PLANT: upright to bushy, floribunda rose
YOUNG SHOOT: no anthocyanin colouration
PRICKLES/THORNS: concave, no short prickles, many long prickles, red with yellow at the tips

ENTIRE LEAF: dark green, weak glossiness, five to seven leaflets
TERMINAL LEAFLET: serrate margin, leathery texture, broad wedge shaped base

FLOWERING SHOOT: low number of flowers per shoot, almost continuous flowering
PEDICEL: absent to weak anthocyanin colouration, glandular hairs
FLOWER BUD: ovoid, whitish yellow
SEPAL EXTENSIONS: weak to medium
FLOWER: fully opened flower round in shape when viewed from above, upper part flat when viewed from the side, lower part flattened convex when viewed from the side, double type, overall colour white
PETALS: white on upper and lower side, very small yellow green petal spot on inner side, no petal spot on outer side, weak reflexing of margin, very weak undulation of margin
REPRODUCTIVE ORGANS: yellow filament, short to medium length style, style pale yellow with red, stigma below to same level as anthers, receptacle small and pitcher shaped in longitudinal section, no prickles on receptacle

Origin & Breeding History: 'Poulcs017' originated from a cross between 'Bernina' as the female parent and an unnamed seedling as the male parent. The cross was made in the summer of 1993 at Fredensborg, Denmark. Seeds from the cross were planted in December 1993 and germinated during the winter and early spring. 'Poulcs017' was selected in the spring of 1994. Selection criteria included uniform and abundant white flowers, vigorous but compact growth habit, disease resistance and suitability for growth in a 19 cm pot.

Tests & Trials: The test and trial for 'Poulcs017' was conducted in the field during the summer of 2007 in St. Thomas, Ontario. The trial included 6 plants of each variety. Bare root plants were planted in the field in the fall of 2005. Plants were grown in rows with plants spaced 60 cm apart and rows spaced 90 cm apart. Observations and measurements were taken on July 26, 2007. All colour measurements were made using the 2001 Royal Horticultural Society (RHS) Colour Chart.

Comparison tables for 'Poulcs017' with reference varieties 'Poulcs004' and 'Poulcs014'

Flower diameter (cm)

  'Poulcs017' 'Poulcs004' 'Poulcs014'
mean 7.0 6.9 5.2
std. deviation 1.06 0.64 0.62

Flower colour (RHS)

  'Poulcs017' 'Poulcs004' 'Poulcs014'
overall 155B (whiter than) 155C (whiter than) with yellow tones in center 4D (whiter than)

Petal colour (RHS)

  'Poulcs017' 'Poulcs004' 'Poulcs014'
upper side - middle 155B-C 155C (whiter than) 4D (whiter than)
upper side - margin 155B-C 155C (whiter than) 4D (whiter than)
lower side - middle 155B 155C (whiter than) 4D (whiter than)
lower side - margin 155B 155B (whiter than) 4D (whiter than)

Petal length (cm)

  'Poulcs017' 'Poulcs004' 'Poulcs014'
mean 3.7 2.9 2.2
std. deviation 0.31 0.17 0.15

Petal width (cm)

  'Poulcs017' 'Poulcs004' 'Poulcs014'
mean 2.8 2.7 1.8
std. deviation 0.30 9.36 0.25

Click on image for larger view
Rose: 'Poulcs017' (centre) with reference varieties 'Poulcs014' (left) and 'Poulcs004' (right)

Click on image for larger view
Rose: 'Poulcs017' (left) with reference variety 'Poulcs004' (right)

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